HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 843
HD6412373R
Manufacturer Part Number
HD6412373R
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412373R.pdf
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16.3.1
ICCRA is an 8-bit readable/writable register that enables or disables the I
transmission or reception, and selects master or slave mode, transmission or reception, and
transfer clock frequency in master mode.
Bit
7
6
5
4
3
2
1
0
Bit Name
ICE
RCVD
MST
TRS
CKS3
CKS2
CKS1
CKS0
I
2
C Bus Control Register A (ICCRA)
Initial Value
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
I
0: This module is halted.
1: This bit is enabled for transfer operations. (SCL
Reception Disable
This bit enables or disables the next operation
when TRS is 0 and ICDRR is read.
0: Enables next reception
1: Disables next reception
Master/Slave Select
Transmit/Receive Select
When arbitration is lost in master mode, MST and
TRS are both reset by hardware, causing a
transition to slave receive mode. Modification of the
TRS bit should be made between transfer frames.
In addition, TRS is set to 1 automatically in slave
receive mode if the seventh bit of the start condition
matches the slave address set in SAR and the
eighth bit is set to 1.
Operating modes are described below according to
MST and TRS combination.
00: Slave receive mode
01: Slave transmit mode
10: Master receive mode
11: Master transmit mode
Transfer clock select 3 to 0
In the master mode, these bits should be set
according to the necessary transfer rate (see table
16.2). In the slave mode, they are used to secure
the data setup time in transmit mode. The data
setup time is 10 tcyc if CKS3 is cleared to 0 and 20
tcyc if CKS3 is set to 1.
2
C Bus Interface Enable
and SDA pins are bus drive state.)
Section 16 I
Rev.7.00 Mar. 18, 2009 page 775 of 1136
2
C Bus Interface 2 (IIC2) (Option)
2
C bus interface, controls
REJ09B0109-0700
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